New tech in power procurement.
A cluster of 2cm railguns is an awesome aa weapon system. Destroying aircraft at 20 to 60km+ with mach 15+ ordinance.
The Zumwelt class is the future of USN sea power.
just 4 could do job of 10 conventional dd's cl's And Aegis class.
[And as a speculative fiction buff. It has awe and gawp factor of 9.1. Angular and unlike classic design it is IN water. not on it.]